Mobile storage unit



FIG. 1 is a perspective view of the mobile storage unit showing my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is right side plan view thereof; and,

FIG. 7 is left side plan view thereof. 

I claim the ornamental design for the mobile storage unit, shown and described. 